Refrigeration unit



FIG. 1 is a top plan view of a refrigeration unit showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a right side elevational view thereof; and

FIG. 7 is a front perspective view thereof.

The shading on the filter media in the front of the refrigeration unit is understood to repeat uniformly across the circumscribed area. 

The ornamental design for a refrigeration unit, as shown and described. 